Machine for trimming the overflow from the breast of rubber heels



T. E KANE. MACHINE FO-Rv TRIMMING THE OVERFLOW FROM THE BREAST 0F RUBBER HEELS.

APPLICATION FILED JAN. 19, 1920.

137,018., Patented A r. 26, 1921,.

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THOMAS E. KANE, 0F CANTON, MASSACHUSETTS, ASSIGN'OR OF ONE-HALF TO ABRAHAM SYDEMAN, OF BOSTON, MASSACHUSETTS.

MACHINE FOR TRIMMING THE OVERFLOW FROM THE BREAST 01E RUBBER HEELS.

Specification of Letters Patent.

Patented Apr. 26, 19211.

Application filed January 19, 1920. Serial No. 352,291.

To all whom it may concern:

Be it known that I, THOMAS E. KANE, a

subject of King George V of England, residing at Canton, in the county of Norfolk and State of Massachusetts, have invented new and useful'lmprovements in Machines for Trimming the Overflow from the Breast of Rubber Heels, of which the following is a specification.

This invention relates to a machine for trimming the overflow from the breast of rubber heels: Rubber heels when molded have a thin fin of rubber extending around the entire upper edge of the heel and that portion of thefin which extends along the upper edge of the breast of the heel is known as the overflow from the breast and will be so referred to in the following specification. It has been the custom to trim this thin fin of rubber from the upper edge of rubber heels, all except the overflow from the breast by means of a pair of rotary cutters and this was possible because the periphery of the heel, except the breast portion, is formed on a convex curve and the outer edge of the heel as a whole is inclined or tapers inwardly from the upper edge toward the tread of the heel, but the breast of the heel is substantially vertical or at right angles to the tread of the heel-and moreover. it is concave and therefore it has been heretofore impossible with the machines on the market to trim the overflow from the breast by means of rotary cutters. This work of trimming the overflow from the breast is at present bein done by hand bymeans of shears and when so done the work isoftentimes imperfect and unsatisfactory and to do the work carefully requires the expenditure of considerable time by skilled labor.

With my invention all of the work can be done by a pair of rotary cutters, and to en-' able this to be done'I use preferably a pair of rotary cutters, the lower of which is preferably substantially eater in diameter than the upper cutter, an ltdjacent to the peripheries of said cutters at the cutting point I provide a convexly curved work-support upon which the 'work rests, the upper face thereof being inclined at an angle-to the median axial lines of the cutters.

In the preferred embodiment of my invention I utilize a pair of rotary cutters and adjacent thereto a work-support having its workcontacting face inclined downwardly section in osition for trimming the over? flow from t 'e breast.

Fig. 2 is a detail end elevation of the cutters and work-support, a heel being shown dotted in twopositions.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, Figs. 1 and 2, 5 is the frame of the machine; 6 and 7 are rotary shafts to which are fastened rotary cutters 8 and 9, respectively. The shafts 6 and 7 are rotated by means of pulleys 10 and 11 and are rotatably mounted upon bearings 12 and 13 on the frame of the machine and are adjustable longitudinally by means of screws 14 and 15, being locked in position by means of lock nuts 16 and 17.

A work-support 18 is fastened to a plate 19 which is fastened tothe base 20 of the frame 5. Said work-support is convexly curved and is provided with a work-supporting face 21 which is inclined downwardly from the adjacent peripheries of the cutters 8 and 9, the worksupporting face of the work-support thus being inclined at an angle to the median axial lines of the shafts 6 and 7 It will be noted that the diameter of the cutter 8 is substantially smaller than the diameter of the cutter The general operation of the machine is as follows:

the work-support 18, and the operator moves the heel from the position shown in dotted l1 nes,-Fig. 2, at the left of the cutters as viewed in said figure to the position shown in dotted lines at the right of said cutters.

ion

Thus the overflow 24 from the breast of said heel 22 which projects from thenpper edge thereof is trimmed quickly and neatly by passin between the cutters 8 and 9.

Whi e I have described my invention as- Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A machine for trimming the overflow from the breast of rubber heels having, in combination, a pair of rotary cutters and a work support having a work-supporting face adjacent to the periphery of said cutters and inclined longitudinally thereof to the median axial lines of said cutters.

2. A machine for trimming the overflow from the breast of rubber heels having, in combination, a pair of rotary cutters arranged one above the other, the upper of said cutters being of substantially smaller dlameter than the lower one of said cutters and a Work-support arranged adjacent to said cutters, the work-supporting face of said work-support being inclined downwardly from a point adjacent to said cutters and longitudinally of the median axial lines of said cutters.

3. A machine for trimming the overflow I from the breast of rubber heels having, in

combination, a pair of rotary cutters and a convexly curved work-support adjacent to said cutters and having its work-supporting face inclined downwardly away from the peripheries of said cutters and at an angle to the median axial lines of said cutters.

4. A machine for trimming the overflow A THOMAS E. KANE. 

